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ABB 3BSC610037R1 SD821

Product Name: ABB SD821 Power Supply Device
Model Number: SD821
ABB Order Number: 3BSC610037R1
Product Family: ABB Advant OCS / Freelance / S800 I/O / System 800xA

Product Overview

The ABB SD821 (3BSC610037R1) is an industrial power supply module designed for ABB automation systems, including ABB Advant OCS, Freelance, S800 I/O, and System 800xA environments. It provides a stable 24 VDC power output for control system components, remote I/O modules, and automation devices.

The SD821 is a DIN rail mounted AC/DC power supply, featuring selectable AC input voltage and support for redundant power configurations when combined with ABB SS82x power voting units.

Technical Specifications

Key Features

• Reliable 24 VDC power supply for ABB control systems
• 115/230 VAC selectable input, suitable for worldwide industrial power networks
• DIN rail installation, allowing easy integration into control cabinets
• Supports redundant power supply architectures using ABB SS82x voting modules
• Designed for continuous operation in industrial automation applications
• Compatible with ABB S800 I/O and Freelance control system architectures

Applications

The ABB SD821 power supply module is commonly used in:

• ABB Freelance DCS systems
• ABB Advant OCS control systems
• ABB System 800xA automation platforms
• ABB S800 remote I/O systems
• Industrial process control cabinets
• Power distribution for PLC/DCS field devices
• Chemical, oil & gas, power generation, and manufacturing automation systems

Related ABB Components

For redundant power configurations, the SD821 can be paired with:

• ABB SS822 Power Voting Unit (3BSC610042R1)
  • Dual 24 VDC inputs
  • Single redundant 24 VDC output
  • Supervises power input status
  • Designed for SD821/SD822/SD823 power supplies

Conclusion

The ABB SD821 (3BSC610037R1) is a dependable industrial power supply module widely used in ABB automation platforms. With its 24 VDC / 2.5 A output, DIN rail mounting design, and redundancy capability, it provides a reliable power solution for critical DCS, PLC, and remote I/O applications. It remains a common spare part for maintaining ABB Advant, Freelance, and System 800xA installations.